Grain-separator



(No Model.)

J. M. KING. GRAIN SEPARATOR. No. 475,779.- Patented May 3l, 1892.

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the machine.

UNITED STATES PATENT OFFICE.

JAMES M. KING, OE ROCHESTER, MINNESOTA.

GRAIN-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 475,779, dated May 31,1892. Application filed October 31, 1891. Serial No. 410,475. (Nomodel.)

To all whom it may concern:

Be it known that I, JAMES M. KING, of Rochester, in the county ofOlmsted and State of Minnesota, have invented certain Improvements inGraiirSeparators, of which the following is a specification.

My invention relates to improvements upon the grain-separating machineupon which a patent of the United States was granted me September 2,1890, and numbered 435,542; and the object of my invention is to providesirnple,inexpensive, and efficient means for driving the rotary screensof said machine.

'lo this end my invention consists in the combination of the severalshafts of the rotary screens with friction-pulleys arranged thereon,carryingpulleys provided beneath the same, and an endless belt passingbetween the frictionpulleys and carrying-pulleys thus provided, andmeans for driving said belt, and in details of construction andcombinations, all as hereinafter described, and particularly pointed outin the claims. y

My invention will be more readily understood by reference to theaccompanying drawings, in .which- Figure I is an end view of a machineembodying my invention. Fig. 2 is a vertical section on the line o; .frof Fig. I. Figs. 3 and 4 are details of the carrying-Wheel boxes, andFig. 5 shows one of the slotted blocks.

As shown in the drawings, my machine is the same in all respects as themachine shown and described in Patent No. 435,542, with the exception ofthe outer wall 2 of the dischargetrunk 3 and the parts arrangedinconnection therewith. Four rotary screens 4 are arranged on each side ofthe machine. Obviously any number may be so arranged. These screens 4are supported in inclined banks, so that they occupy the least possiblespace, while in no way interfering with one another. These banks slantin toward the center, as indicated by the position of the pulleys on theend of (See Fig. l.)

5 represents the feed-hopper, having the inclined andalternately-arranged shelves 6.

The hollow journals 7 of the screens extend into the feed-hopper throughthe walls S thereof, and the grain enters the rotary sieve through thesame and passes out through the opening 9 in the other end of the sieve.Each rotary screen-shaft 10 extends through the wall Il and through aslot I2, provided in a block I3, secured in the wall 2. On the end ofeach shaft I provide an iron pulley I4, having a rubber periphery I5.Longitudinal' play of the shaft is prevented by a collar 16, arranged onthe inside of the wall 2 aud on the shaft.

As shown, the blocks I3 are secured in rectangular openings in the wall2 of the machine by the inclined plates 39 lapping over the edges of theblocks. The slots-in these blocks extend at right angles to a line drawnthrough the centers of the shafts in the same bank. In line with andbeneath the iron pulleys I provide the carriers 1S, arranged in theboxes 19, which are made adjustable. In the middle of the end Wall Iprovide the larger idlers 2O and 2l to give the belt the properdirection. These idlers are arranged one above the other and are in linewith the several banks ot' screens.

On the sides of the machine and supported in bearings 22, arranged onthe carrier-post 23, I provide the driving-shafts 24, and on these largepulleys 25. On one drive-shaft is a pulley 26, over which the maindriving-belt passes. The diameters of these large pulleys 25 are aboutequal to the distance between the banks of screens, and the belt 27extends over the same and between iron pulleys I4, having the rubberperiphery, and their carrier-pulleys I8. The middle of each side or legof the belt passes under the idler 2O 2l, so that the belt passestangentially between lthe rows of pulleys I4 and I8.

It will be seen that the weight of the iron pulleys and the end of thescreen, added to the weight of the grain in the screen, presses therubbereband periphery of each pulley I4 firmly down upon the belt,which, being entirely supported by the carrier, drives the screens aseectually as a gear. The carrierpulley boxes I9 are made up of the twoinclined side boards or bars 33, provided with the slots 34 to receivethe short shafts of the carrier-pulleys and fastened together at the endby the blocks 35. The slots 36 are provided in such ends, so that byloosening the nuts 8S of the bolts passing therethrough the box may beadjusted up or down to press the idlers more or less firmly into contactwith the IOO belt. The blocks 13 may be secured in the end of themachine in any suitable way, and upon being removed leave an openingtherein large enough to allow the rotary screen to be drawn out endwisewith the shaft and its other attachment.

It is obvious that instead of arranging the screens in the banks, asshown, they may be arranged in horizon tal tiers, in which case the beltwould extend straight across the end of the machine and the idlers 2Oand 21 would be dispensed with.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. The combination,with an endless belt, of pulleys for driving, idlers or carriersarranged for said belt to rest upon, screen-shafts arranged above thesame, and weighted pulleys thereon bearing upon said belt and driventhereby, substantially as and for the purpose specified.

2. The combination, in a grain-separating machine, of rotary sieves withshafts attached,

` my hand this 26th day of October, 1891.

supporting-walls and bearings for said shafts, large pulleys 25, a belt27, arranged upon the same, means-for driving said belt, pulleysarranged on said shafts and bearing upon said belt, and carrier-pulleysarranged under the same, and said belt passing between said carriers andshaft-pulleys, substantially as described.

3. The combination, in a grain-separating machine, of rotary screens andthe shafts thereof provided With pulleys, with the Walls of saidmachine, slotted blocks wherein the shafts are supported, pulleys 25,the belt 27, and carriers 18, arranged under said shaftpulleys and adjustably arranged with respect to the same, substantially as described.

4. The combination,with the rotary screen and the shafts thereof, of theWalls of the machine, large rectangular openings therein, the blocks 13,secured in said openings and provided with slotted bearings for saidshafts, large pulleys 25, means for driving the same, a belt 27, passingover the same, idlers 20 and 2l, carrier-boxes 19 and carriers arrangedtherein, and iron pulleys 14, provided with rubber tires 15 and arrangedabove said carriers u 18, said boxes being adjustable, substantially asdescribed.

In testimony whereof I have hereunto set JAMES M. KING. In presence of-JOHN EDGAR, C. W. STREETER.

